[Champ04]

So I ran across something I've never seen before and would like someone with more experience to explain it to me.

I have a pair of Dunlavy SC-1 speakers. The design uses a pair of Vifa P13WG-00 8ohm drivers in parallel.
It's a first order design, so only one coil. The coil has no value marking on it but I know it to be crossed over at 3500Hz.

Here is the confusing part. The circuit has a zobel (2ohm/2.7u). But instead of paralleling the drivers, which is what I have always seen before, it parallels the coil.

Why?

Looking at the impedance/phase measurements, it is obviously preventing the impedance from rising in the upper frequency of the driver's operating range.

What difference does this design make?

Thanks!

 

[Champ04]

okay, no bites on this one.

Can anyone suggest a forum somewhere more fitting for this type of question?
Thanks!!

 

[Nick 214]

Quote:

Originally Posted by Champ04 /img/forum/go_quote.gif okay, no bites on this one. Can anyone suggest a forum somewhere more fitting for this type of question? Thanks!!

Yes. Come on over to PE's Tech Talk.

Tech Talk - Powered by vBulletin

We're a small, yet dedicated group. If you don't get many responses, I'll send out some PMs...

Good Luck!

 

[Champ04]

cool.
Thanks!

 

[Brian_the_King]

If Nick's suggestion doesn't do the trick, there are a few members on Audioholics that will be able to help with this.

 

[sunseeker888]

Like you say, this design is used to prevent impedance swings at certain frequencies. I sincerely doubt that that crossover circuit would degrade sonics much; and it is requiring for overall system response.

As usual, if the quality of parts is decent, and the design is implemented correctly, there is no need for concern.